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Pure water boils at 373.15 K and nitric ...

Pure water boils at `373.15 K` and nitric acid boils at `359.15 K`. An azeotropic mixture of `H_(2)O` and `HNO_(3)` boils at `393.15 K`. Distilling the azeotropic mixture will cause

A

pure water to distil over first

B

pure nitric acid to distil over first

C

one of them to distil over with a small amount of the other.

D

both of them to distil over in the same composition as that of the mixture being distilled.

Text Solution

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The correct Answer is:
4
Azeotropes are binary mixture (nonideal solutions) which have the same composition in liquid and vapour phase and hence boil at a constant temperature. In such cases, it is not possible to seprate the components.
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Knowledge Check

  • Pure water boils at 373 K and pure nitric acid boils at 359 K. The azeotropic mixture of water and nitric acid boils at T.K.

    A
    `T lt 359 K`
    B
    `T gt 359 K`
    C
    `T lt 373 K"but"gt 359 K`
    D
    Unpredictable

  • Azeotropic mixture of water and C_(2)H_(5)OH boils at 351 K. By distilling the mixture it is possible to obtain

    A
    pure `C_(2)H_(5)OH ` only
    B
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    C
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